Abstract
We argue that there are three norms of critical discussion in stark relief in Republic I. The first we see in the exchange with Cephalus---that we interpret each other and contribute to discussions in a maximally argumentative fashion. The second we seein the exchange with Polemarchus---that in order to cooperate in dialectic, interlocutors must maintain a distance between themselves and the theses they espouse. This way they can subject the views to serious scrutiny without the risk of personal loss. Third, and finally, from Socrates’ exchange with Thrasymachus, it is clear that uncooperative discussants must be handled in a fashion that reinforces the goals of dialectic. So Thrasymachus is refuted and silenced not just for the sake of correcting his definition of justice, but also for the sake of those listening